Baby-sitter Marianne Benjamins-Williams, 45, was watching the infant along with his 14-month-old sister last month when the child had to be rushed to Bellevue Hospital because he was having trouble breathing, court papers state.

Doctors operated and discovered “a balled up baby wipe” in the boy’s throat, according to the criminal complaint.

Authorities dismissed the idea that the infant’s sister might have accidentally put the baby wipe in his windpipe, the papers said.

“A fourteen-month-old child does not have the strength, finger length, or developmental ability,’’ the complaint said, quoting an attending doctor.

Benjamins-Williams was charged with attempted murder, strangulation, assault, endangering the welfare of a child and other related charges.

She pleaded not guilty in Manhattan Criminal Court on Tuesday and was held on $100,000 bail.